Home / 457,930.47-687,040.56-205,427.55

Finding the Fourth Proportional to 457,930.47, 687,040.56 and 205,427.55

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Solution

The fourth proportional to 457,930.47, 687,040.56 and 205,427.55 is: 308,206.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,930.47 : 687,040.56 = 205,427.55 : x
  2. Step 2: Convert to fraction form
    457,930.47/687,040.56 = 205,427.55/x
  3. Step 3: Cross multiply
    457,930.47x = 687,040.56 × 205,427.55
  4. Step 4: Simplify right side
    457,930.47x = 141,137,058,991.43
  5. Step 5: Solve for x
    x = 141,137,058,991.43/457,930.47
  6. Step 6: Final answer
    x = 308,206.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.